The Taliban have begun rounding up Afghans on a blacklist of people they believe have worked in key roles with the previous Afghan administration or with U.S.-led forces that supported it, according to a report by a Norwegian intelligence group.

The report, compiled by the RHIPTO Norwegian Center for Global Analyses and seen by Reuters, said the Taliban were hunting individuals linked to the previous administration, which fell on Sunday when the Islamist militant movement took Kabul.

“Taliban are intensifying the hunt-down of all individuals and collaborators with the former regime, and if unsuccessful, target and arrest the families and punish them according to their own interpretation of Sharia law,” said the report, dated Wednesday.

“Particularly at risk are individuals in central positions in military, police and investigative units.”